You might as well compare with these Back Items so you can decide which Back Items you're gonna use for ninja Saga Pvp or in Hunting House for easier killing the boss or your opponent in ninja saga PvP
These Back Items might have better effect . Here we go :

• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• Aboriginal Hunting Set

  Increase accuracy by 5% and Combustion chance 6%.
• Golden Torch of Zeus

  Recover 150 HP every turn
• Hanagara Dama

  Increase max. CP by 6%
• Dragon Crucifix Spear
• Scroll: Messenger (3 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Deadwood Pipa
• S3 Fossil of Magatama

  Increase purify chance by 6%. Has 10% chance to convert damage taken to HP positively.
• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• Shishimai Back

  Restores 3% of users max HP.Has 4% chance to convert damage taken to HP positively.
• Sakura Straw Hat

  Recovers 2% of users max HP every turn.
• Light Cry Raijinco
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• Radish Launcher

  It will fly you to the moon! (Easter 2011 Limited Edition)
• Dark Evil Sickle

  Exclusive Halloween item - the devils sickle that has 10% chance to absorb 1% HP of enemy who attack you.
• Lucky Chess

  Has 5% chance to freeze enemy who attacks user (3 turn). Frozen target cannot move but damage taken is reduced by 80%. Each turn recover 100 HP and 100 CP.
• Nutcracker

  Increases Max. HP by 4% and damage by 3%.
• GM Phone

  GM Phone
• Flag of the Burning Legion

  Reduce 3% damage taken and 12% chance to absorb 2% HP of enemy who attack you.
• Toxic Spider Web

  10% chance to apply Restriction on enemies who attacks the user for 1 turn.
  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%
• Purple Mixing Yellow Umbrella
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Carp Flag
• Mini Octopus
• Fairy Fishing Rod

  Each turn recover 3% HP and 100 CP
• Champion Cup!

  Ultimate prize for Champions.